Preparation method of styrene-free unsaturated resin

Abstract

The invention relates to a preparation method of styrene-free unsaturated resin. The preparation method includes: subjecting monohydric alcohol, polyhydric alcohol, monoacid / anhydride, saturated polyacid / anhydride and / or unsaturated polyacid / anhydride to melt polymerization to obtain saturated or unsaturated polyester; well mixing (methyl) glycidyl acrylate and saturated or unsaturated polyester,and allowing ring-opening addition reaction under action of a catalyst to obtain unsaturated resin; mixing the unsaturated resin, an active diluent and a polymerization inhibitor to obtain the styrene-free unsaturated resin. The styrene-free unsaturated resin prepared by the method is simple, convenient and quick in synthesis path, moderate in viscosity, high in wettability and excellent in adhesion with a base material, and different process needs are met; the styrene-free unsaturated resin is high in surface air drying performance, supportive of quick curing, excellent in comprehensive mechanical performance and operability, low in VOC and environment-friendly in emission, can be widely applied in the field of building, home decoration, traffic vehicle-ship interior trim parts and mechanical parts, belongs to general chemicals and is conducive to logistics transportation.

Description

technical field [0001] The invention relates to the field of polymer composite materials, in particular to a preparation method of styrene-free unsaturated resin. Background technique [0002] As we all know, unsaturated resin products are widely used in national economic fields such as wind power energy, rail transit, lightweight engineering, environmental protection engineering, energy-saving buildings, home decoration and finishing, which greatly facilitate the daily life of the people. Considering the performance and price factors of the final product, generally unsaturated resins use styrene as a diluent, accounting for about 20-50%. However, styrene has a low flash point and is volatile. Most importantly, styrene has strong irritating and anesthetic effects, as well as potential carcinogenicity and mutagenesis. It has been listed as a priority hazardous substance by the environmental protection bureaus of major countries in the world. , all countries have limited the ...

AI Technical Summary

Problems solved by technology

They found that the performance of some formulations can reach or even exceed the performance of cured styrene-containing unsaturated polyester resins. It can be seen that the combination of urethane acrylate and multifunctional acrylate plays a vital role in improving the performance of the resin, but the program The components are complex, and the problem of air drying of resin products is not mentioned

JP2002332316A discloses a styrene-free resin, which uses hydroxyalkyl methacrylate as a reactive diluent. Although the resin has excellent curability, safety and surface dryness, it has the problem of insufficient adhesion to the substrate

CN105622858A discloses the use of non-volatile, low-odor acrylate monomers to replace styrene, mixed with unsaturated polyester modified by block copolymerization of acrylate hydroxyl ester and isocyanate, to form the main component of styrene-free resin, but there are complicated steps , The toxicity of isocyanate is high, and the molecular weight of unsaturated polyester modified by block copolymerization is large.

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